Made-to-measure flat rooflights and roof lanterns in slimline aluminium — the modern minimal-frame look that lets daylight do the works Whether you want a frameless-look flat panel for a contemporary kitchen extension, or a traditional pitched lantern as a feature centerpiece, both arrive factory-glazed in your exact size and ready for your roofer to installs
The two products solve different problems — here's the honest comparison:
| Flat rooflight | Roof lantern | |
|---|---|---|
| Visual style | Minimal, contemporary, almost frameless | Pitched glass dome, traditional |
| Profile above roof | Sits ~150mm above on an upstand | 500–800mm tall pitched dome |
| Best for | Modern single-storey extensions, garage conversions, kitchen islands | Traditional extensions, conservatories, period homes |
| Light vs feature | Maximum daylight, no visual intrusion | Becomes the centerpiece — the roof itself is the architecture |
| Typical price (2m × 1.5m) | £900–£1,400 | £1,800–£2,800 |
| Self-installable? | By a competent roofer/builder | By a competent roofer/builder |
Rule of thumb: modern interior = flat, traditional or feature-led = lanterns Not sure? Send a couple of mood-board photos with your quote request and we'll suggest which fits the look you're afters
Aluminium is the only sensible frame material for modern roof glazing — it's stiff enough to span a 3m opening without a centre bar, light enough that one or two roofers can land it onto an upstand without lifting gear, and the powder-coat finish stays consistent for decades in coastal and exposed locations. Slimline profiles (50–70mm visible above the glass) maximise the daylight-to-frame ratio, so a 2m × 1.5m rooflight delivers significantly more usable light than the same opening with a thicker uPVC or steel frames
We supply made-to-measure aluminium rooflights and lanterns from established UK manufacturers chosen for joint tolerances, glazing reliability and powder-coat durability — the things that determine whether a rooflight still looks good and stays watertight 10 years after installs
Type (flat or lantern), opening size, colour, vent yes/nos
Itemised email quote with the exact specs No site visit neededs
10–14 working days made-to-measures Free delivery England & Wales.
Reply within one working days No sales pressure, no call-backs unless you asks
Have architect drawings or roof plans? Submit the form first — we'll email confirmation, then you can reply and attach drawings, photos or sections. The drawing helps us spec the upstand and confirm the rooflight will fit your roof constructions
A modern roof window with an aluminium frame as narrow as 50–70mm visible above the glass — significantly slimmer than older roof glazings Two main formats: flat rooflights (a single glass panel that sits flush in a flat or low-pitched roof) and roof lanterns (a multi-pitched glass dome that becomes an architectural feature)s Both arrive factory-glazed in your exact size and ready for your roofer to installs
Flat rooflights typically £600 for a 1m × 1m up to £2,200 for a 2m × 3m unit, depending on size and glass specs Roof lanterns typically £1,400 for a 1m × 1.5m up to £4,500 for a 2m × 3m four-sided lanterns Add bespoke colour, opening vents or solar-control glass for additional costs
Flat rooflights: 600 × 600mm minimum up to roughly 3000 × 2500mm in a single units Roof lanterns: 1000 × 1500mm minimum up to 3000 × 4500mm in a single units Larger spans are possible by combining multiple units side by sides
Flat for modern single-storey extensions where you want maximum daylight without an architectural features Lantern for traditional kitchen extensions, conservatories or period properties where the roof becomes a centerpieces The comparison table above breaks down the differences side by sides
Yes — optionals Manual chain-operated, electric remote-controlled and rain-sensor automatic versions all availables Vented rooflights add ventilation for kitchens and bathrooms (Part F compliance) and help with summer overheating in single-storey extensions.
Standard: 28mm toughened double-glazed unit, 4mm toughened outer + 4mm toughened inner with 20mm argon-filled cavity, low-E soft-coat for thermal performance and a neutral solar-control coatings Optional: triple glazing, self-cleaning Pilkington Activ outer pane, blue or grey solar tints, blackout glass.
No — supply onlys Slimline aluminium rooflights are designed for easy installation by a competent roofer or builder, with detailed installation guides includeds We can recommend a London / Home Counties fitter on requests The trickiest part is making sure the upstand is correctly built and waterproofed before the rooflight goes on — that's a builder's responsibility, not ours.
Call 0800 861 1450 Monday–Friday 8am–5:30pm or Saturday 9am–1pms
Need bifold doors for the same extension? See the Cortizo bifold ranges